| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1336005 | Polyhedron | 2011 | 4 Pages |
The preparation and magnetic properties of two Fe(II) Schiff-base complexes, [Fe(qnal-12)2]·2C6H6 (1) and [Fe(Hqsalc)2] (2), (Hqnal-12 = N-(8′-quinolyl)-1-hydroxy-2-naphthaldimine, H2qsalc = 4-hydroxy-3-[(8-quinolinylimino)methyl]benzoic acid) are reported. X-ray single crystal structure analysis of 1 reveals that an Fe(II) ion is coordinated by two qnal-12 ligands in a meridional fashion. Molecular packing of 1 shows that a qnal-12 interacts with neighboring two qnal-12’s through π–π interactions, which results in the formation of one-dimensional chain. Although the magnetic property of 1 shows a high-spin state at all the temperature range measured, the χT–T plot of 2 shows abrupt spin crossover behavior with a wide hysteresis of 21 K, probably due to the hydrogen-bond network originated by carboxyl groups.
Graphical abstractThe preparation and magnetic properties of two Fe(II) Schiff-base complexes, [Fe(qnal-12)2]·2C6H6 (1) and [Fe(Hqsalc)2] (2), are reported. The χT–T plot of 2 shows abrupt spin crossover behavior with a wide hysteresis of 21 K, probably due to the hydrogen-bond network originated by carboxyl groups.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Two iron(II) Schiff-base complexes with an N4O2 coordination are examined. ► [Fe(qnal-12)2]·2C6H6 shows no SCO due to the distorted structure. ► [Fe(Hqsalc)2] with carboxyl groups shows abrupt SCO with 21 K hysteresis.
